Design of a Tandem Conjugated Polymer Bulk Heterostructure Solar Cell

摘要

The design of a conjugated polymer-based multilayered solar cell is presented. The device, comprised of layers of bulk heterojunctions, takes advantage of the diverse absorption characteristics of the materials involved to improve efficiency. 100 nm layers of poly[2-methoxy-5-(3',7'-dimethyloctyloxy)-1-4-phenylene vinylene]: phenyl C61-butyric acid methylester MDMO-PPV:PCBM (1:4), (poly-3-hexylthiophene):phenyl C61-butyric acid methylester P3HT:PCBM (1:1) and poly[2,6-^s(4,4-bis-(2-ethylhexyl)-4H-cyclopen[2,1-b;3,4-b'] dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] PCPDTBT: PCBM (1:3), are designed to be connected using transparent cathodes of lithium fluoride/aluminum/gold LiF/Al/Au, which are compatible with PCBM LUMO. Studies on the effects of insertion of identical sub-cells, thermal, electrical and solvent annealing is also considered.